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Find Value of RTH Between Terminals A and B

By BYJU'S Exam Prep

Updated on: September 25th, 2023

Find the value of RTH between terminals A and B of the circuit given below.

  1. 120 Ω
  2. 168 Ω
  3. 288 Ω
  4. 70 Ω

Answer: Option D. 70 Ω

The value of RTH between terminals A and B of the given circuit is 70 Ω.

Solution

While calculating the Thevenin resistance, voltage and current sources are replaced by their internal resistances. 

RTH between terminals A and B is-

100 Ω and 68 Ω resistances are in series, 

120 Ω and (100 Ω and 68 Ω) are in parallel.

RTH=(120×168)/(120+168)=70 Ω

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